VAMP Ltd
Arc protection system
Operation and configuration instructions
VAMP 221
VM221.EN013
VAMP 24h support phone : +358 (0)20 753 3264
33
•
If there is no voltage supply, find out whether it should
be supplied from the central unit or an external voltage
supply. Check the voltage of the external voltage
supply, if any.
•
If the voltage is supplied by the central unit, measure
its 24 Vdc supply voltage (X3-2 +24 Vdc, X3-1 GND). If
there is no voltage, replace the central unit.
4.
The I/O unit is faulty.
Corrective measures:
•
If the TEST/ERROR indication light is permanently lit
and no sensor is activated, either the modular cable
(see above) or the I/O unit is faulty. In this case the I/O
unit must be replaced.
Too long BI/O bus activation (fault code 12)
Power
Com
Error
Trip 4
Trip 2
Trip 3
I>int.
I>ext.
Trip 1
VAMP 221
Arc Protection Relay
Run
Install
Info
Temp set
Temp
Current
Error code
front_error12
Figure 3.1.4-3 The system indicates that the BI/O bus has remained
activated for longer than three seconds
This fault code indicates that the system’s BI/O bus has
remained activated for too long for normal operation.
Potential causes:
1.
A sensor connected to the unit via the BI/O bus has
remained activated for longer than three seconds.
Corrective measures:
•
Check the physical location of the activated sensor.
•
Strong direct light may activate the sensor
•
If the arc sensor is not exposed to direct light, remove
one of the sensor conductors to check that the sensor
cable is not short-circuited. If the fault disappears, the
sensor or cable is probably faulty. In this case, replace
the faulty sensor.
•
In the overcurrent unit, check the range of the
overcurrent setting and whether the nominal values of
the current transformers’ secondary circuits are
compatible.